Fritzsch B
Cell Tissue Res. 1981;218(3):581-94. doi: 10.1007/BF00210117.
The organization of posterior and anterior afferents of the lateral-line system was studied in several species of urodeles by means of transganglionic transport of horseradish peroxidase. The afferents of each lateral-line nerve form distinct fascicles in the medullary alar plate. Each of the two branches of the anterior lateral-line nerve is organized in two long and one short fascicles. The posterior lateral-line afferents form only two long fascicles. Each ordinary neuromast is supplied by only two afferents, which run in the two ventral medullary fiber bundles. It is suggested that afferents to hair cells displaying one type of polarity form together one bundle, but those contacting hair cells polarized in the opposite way form the second ventral bundle of one lateral-line branch. Thus, the lateral-line afferents may be organized in a directotopic fashion. The short dorsal fascicle formed only by the anterior lateral-line afferents receives fibers exclusively from small pit organs. Each pit organ is supplied by only one afferent. Anatomically, these pit organs resemble in many respects the electroreceptive ampullary organs of certain fish. Neurons labeled retrogradely via the anterior lateral-line nerve afferents have been attributed to the nervus trigeminus or facialis. In addition to the posterior lateral-line afferents, only few centrifugally projecting neurons were labeled. These neurons are discussed as efferents to the posterior lateral-line neuromasts.
利用辣根过氧化物酶的跨神经节运输，对几种有尾两栖动物侧线系统的前后传入神经的组织进行了研究。每条侧线神经的传入神经在延髓翼板中形成不同的束。前侧线神经的两个分支中的每一个都由两个长束和一个短束组成。后侧线传入神经仅形成两个长束。每个普通神经丘仅由两条传入神经供应，它们在两条腹侧延髓纤维束中运行。有人提出，向显示一种极性的毛细胞传入的神经纤维共同形成一束，而与极性相反的毛细胞接触的神经纤维则形成侧线分支的第二条腹侧束。因此，侧线传入神经可能以一种直接定位的方式组织起来。仅由前侧线传入神经形成的短背侧束仅从小坑器官接收纤维。每个坑器官仅由一条传入神经供应。从解剖学上讲，这些坑器官在许多方面类似于某些鱼类的电感受壶腹器官。通过前侧线神经传入神经逆行标记的神经元被认为属于三叉神经或面神经。除了后侧线传入神经外，仅标记了少数离心投射神经元。这些神经元被认为是后侧线神经丘的传出神经。
